20807755

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 27993600

約数和(自身を除く): 7185845

約数列:

[1, 5, 19, 23, 89, 95, 107, 115, 437, 445, 535, 1691, 2033, 2047, 2185, 2461, 8455, 9523, 10165, 10235, 12305, 38893, 46759, 47615, 180937, 194465, 219029, 233795, 904685, 1095145, 4161551, 20807755]

約数ペア:

[(1, 20807755), (5, 4161551), (19, 1095145), (23, 904685), (89, 233795), (95, 219029), (107, 194465), (115, 180937), (437, 47615), (445, 46759), (535, 38893), (1691, 12305), (2033, 10235), (2047, 10165), (2185, 9523), (2461, 8455)]